supply of flash back arrestor (dry type) for regulator end of oxygen lines , flash back arrestor (dry type) for regulator end of oxygen lines to prevent flash backs in oxy fuel system conforming to en 730/iso 5175-1/is 11006/2011, (ra.-2021), amd.-1 of dec. 2013 standards with flame arrestor(fa) and non r eturn valve (nrv) and thermal cut off valve (tv) working ressure:15 bar. end connections g 3/8 rh to en 560/iso 3253 st andards. make: messer (dgn oxy) or esab (protex ro) or gce (fr-34 r oxy) or weldstar (fire pro ro) only. note:1) offers o f oems or their authorised dealers enclosing valid authorised dealership certificate only will be considered. 2) the su ppliers shall send test certificate from govt.authorised test house. in case of international brand,the test certificate from reputed institute like bam, germany is mandatory. 3) the suppliers should have equipments for testing of flash ba ck arrestors and calibration. the purchaser has the right to inspect these installations. specn: :en 730/iso 5175-1/is 110 06/2011, (ra.-2021), amd.-1 of dec. 2013 [ warranty period: 30 months after the date of delivery ] [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitted: max 8 lacs ] ]